You know what it looks like… but what is it called?
TAKE THE QUIZheliodon
noun
he·li·o·don
ˈhēlēəˌdän
plural -s
: a device consisting of a pivoted platform and a spotlight on a vertical track used to simulate sun and shadow orientation for any latitude and day of year for a proposed building
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Merriam-Webster unabridged
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